If you mean probabilistic expectation, the answer is no.
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The meal did not meet the expectation.
The expectation was rather low.
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I assume this is a trick question, and the answer is
"everything".
If you expect it, it is your expectation
and
if it is your expectation, you expect it.
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Yes. the conditional expectation of X given Y is simply the
expectation of X if X and Y are uncorrelated. This is a consequence
of one of the properties of conditional expectation.